Moistening device for web materials



y 23, 9 I K. DIETSCHE 2,209,113

MOISTENING DEVICE FOR WEB MATERIALS Filed Aug. 24. 1938 Patented July 23, 1940 UNITED STATES PATENT OFFICE MOISTENING DEVICE FOR WEB MATERIALS Germany Application August 24, 1938, Serial No. 226,418

In Germany August 24, 1937 5 Claims. (01.91-44) The present invention relates .to devices for moistening fabric and paper webs of all kinds, and in particular to the type where the liquid to be applied to the fabric or paper web issues from the jacket of a sprinkler cylinder. The object of the invention is to provide a new constructional form of devices working with sprinkler cylinders, by means of which a finer atomization of the liquid is obtained and a uniform distribution upon the web is ensured.

According to the invention there is arranged, in addition to the sprinkler cylinder, the axis of which is adapted to act in the manner of a feed nozzle pipe and the perforated jacket of which is provided with a lining pervious to liquids, a fan cylinder which atomizes the liquid particles centrifuged from the sprinkler cylinder and conveys them to the fabric web. The fan cylinder is mounted parallel to and has the same length as the sprinkler cylinder, and carries radially disposed blades or vanes along its entire length. It is driven in the same direction of rotation as the sprinkler cylinder. The two cylinders are housed in one common casing which but for an outlet slot is totally enclosed, care being taken that only the atomized liquid coming from the fan cylinder is allowed to reach the fabric web through the slot, as the former is passed by the latter.

The fan cylinder is-preferably disposed beside the sprinkler cylinder and the outlet slot is ar- I ranged in the Wall of the casing adjacent the fan cylinder, the upper edge of the slot being designed in the manner of a gutter. The bottom of the casing is preferably designed in the manner of a trough, baflie plates being arranged for preventing a centrifuging of the liquid particles direct ,on to the fabric web from the sprinkler cylinder.

The invention is hereinafter explained in more detail with the aid of the constructional forms illustrated in the drawing by way of example. In these Figure 1 is a cross-section, and

Fig. 2 a partial longitudinal section on the line 2-2 in Figure 1, and

Fig. 3 a partial longitudinal section on the line 33 in Figure 1.

The lateral bearing housings I, 2 carry a sprinkler cylii der 3 and a fan cylinder 4 disposed side by side and rotatably mounted. The sprinkler.

cylinder 3 consists of a perforated sheet metal jacket 5, which is rotatable in bearings 'I in the bearing housings I, 2 by means of end members 6. The sheet metal jacket 5 is covered upon the outside with a layer 24 of felt or similar absorbent material. A nozzle pipe 9 is passed through a shaft bore 8 of the end members 6 and connected to a supply pipe. The sprinkler cylinder is driven by means of a belt pulley Ill keyed to one of the end members 6 and in turn driven from a power drive not illustrated on. the drawing.

The fan cylinder '4 consists of the end covers I2 arranged upon axle journals H, the said covers carrying a sheet metal jacket I3. The sheet metal jacket I3 has the same length as the sprinkler cylinder 3 and carries upon the outside, radially extending vanes or blades I4. The said blades may alternatively be arranged in the manner of a helical screw thread upon the sheet metal jacket,

so long as the said thread extends over the entire length of the jacket I3. 1

Both cylinders are mounted in water-tight ball bearings 25. The fan cylinder 4 is driven in the same-'directtion of rotation as the sprinkler cylinder and preferably also from the same source of power. The rotational speed of the fan cylinder 4 depends upon the degree of atomization desired.

The two cylinders 3, 4 are enclosed by means of a sheet metal casing I5 carried upon the bearing housing I, 2. Adjacent the fan cylinder 4 the sheet metal casing I5 is providediwith an. outlet slot I6, through which the atomized liquid is ejected by the fan cylinder 4 on to the fabric or paper web I8 as the latter passes over the rollers H. The upper edge of the slot I6 is designed in the manner of a gutter I9 for collecting and draining the liquid condensing upon thesheet metal jacket I5.

The bottom 20 of the casing I5 is inclined downwardly in the direction of the sprinkler cylinder and acts as a collecting trough. The liquid collected here is drained away through a pipe 2|. The bottom is further provided with bafile plates 22 having drain openings 23.

' The device works as follows:

The liquid issuing from the nozzle pipe 9 passes through the perforated sheet metal jacket 5 onto the layer 24 around the cylinder and owing to the rotation of the cylinder 3 it is tangentially centrifuged in the form of drops. The liquid particles centrifuged in the direction of the fan cylinder 4 are then atomized by the latter and reach the fabric web I8 through the slot I6.

The liquid particles which do not reach the fan cylinder and the condensate forming upon the casing wall are collected in the gutter I9 and in the bottom trough 20 respectively.

What I claim and desire to secure by Letters Patent of the United States is:

1. A material moistening device comprising a rotatable sprinkler cylinder operable, when rocasing having an aperture for the issuance from tated, to efiect a sprinkled projection therefrom of liquid supplied thereto, and a rotatable liquid atomizing cylinder interposed between said sprinkler cylinder and the material to be mois tened so as to intercept liquid projected from said sprinkler cylinder toward the material to be moistened and thereby prevent direct sprinkling of the material by liquid projected by said sprinkler cylinder, said atomizing cylinder being eflective, when rotated, to atomize liquid delivered thereto in sprinkled form by said sprinkling cylinder and to project the atomized liquid onto the material to be moistened.

2. A material moistening device comprising a hollow, perforated, rotatable sprinkler cylinder, means for supplying liquid to the interior of said cylinder, a layer of material, pervious to liquid, around said cylinder whereby said cylinder is operable, when rotated, to effect asprinkled projection of liquid therefrom, and a bladed, rotatable liquid atomizing cylinder efiective, when rotated, to atomize liquid sprinkledthereagainst and to project the atomized liquid therefrom, said atomizing cylinder being disposed in receiving relationship to liquid projected in sprinkled form from said sprinkler cylinder and to prevent direct sprinkling of the material to be moistened by liquid projected from said said casing of atomized liquid upon a piece of material disposed exteriorly of said casing adjacent to said aperture, a bladed, rotatable liquid atomizing cylinder effective, when rotated, to effect atomization of liquid sprinkled thereagainst and to project the atomized liquid therefrom, said atomizing cylinder being disposed within said casing in a position to effect projection of atomized liquid through said casing aperture upon the material to be moistened, a rotatable sprinkler cylinder within said casing spaced in claim 3 including a bafile plate within the easing interposed between the casing opening and the sprinkler cylinder and cooperating with the atomizing cylinder to prevent direct sprinkling of the material to be moistened by liquid pro-' jected from the sprinkler cylinder.

5. A material moistening device as set forth in claim 2 in which the blades of the atomizing cylinder are substantially radially disposed at angularly spaced points and extend longitudinally along said cylinder.

KARL DIETSCHE. 

